react-qr-code

A component for React. This library works with React and React Native (using React Native SVG).

Screenshots

Web

Android & iOS

Installation

npm i react-qr-code

When using this library with React Native, you will also need to have react-native-svg installed.

npm i react-native-svg
cd ios && pod install

The Gist

import React from "react";
import ReactDOM from "react-dom";
import QRCode from "react-qr-code";

ReactDOM.render(<QRCode value="hey" />, document.getElementById("Container"));

Note: If the QR code is likely to appear next to dark objects, you will need to wrap it in a light-colored container to preserve the 'quiet zone', e.g.

<div style={{ background: 'white', padding: '16px' }}>
  <QRCode ... />
</div>

Responsive QR code example:

// Can be anything instead of `maxWidth` that limits the width.
<div style={{ height: "auto", margin: "0 auto", maxWidth: 64, width: "100%" }}>
  <QRCode
    size={256}
    style={{ height: "auto", maxWidth: "100%", width: "100%" }}
    value={value}
    viewBox={`0 0 256 256`}
  />
</div>

API

prop	type	default value	platform
bgColor	string	'#FFFFFF'	web, ios, android
fgColor	string	'#000000'	web, ios, android
level	string ('L' 'M' 'Q' 'H')	'L'	web, ios, android
size	number	256	web, ios, android
title	string		web
value	string		web, ios, android

Adheres to the official QR spec and can store up to 2953 characters in value.

Non-ASCII / UTF-8 text

react-qr-code encodes data in UTF-8 byte mode to ensure non-ASCII text (e.g., Korean, Japanese, emoji) renders and scans correctly. Just pass a normal JavaScript string:

<QRCode value="한글 테스트 😊" />

No additional encoding is required on your side.

Testing UTF-8 locally

1. Build the demo library bundle in watch mode:
   • In one terminal: npm run demo-web-watch
2. Run the demo app:
   • In another terminal: npm run demo
3. Open the demo in your browser (Expo starts it automatically) and type a non-ASCII value (e.g., 안녕하세요, こんにちは, or an emoji) into the input.
4. Scan the QR code with a phone camera app. The decoded text should match exactly.

License

MIT